They say here the smaller units react more quickly. Any insight into why they chose to go with the turbos separately feeding 3 cylinders each and not a sequential arrangement. Sequential twin-turbos are supposed to rid of 'turbo lag' and also provide quick reaction at low RPM, with a quick to spool small turbo and offer big power with a larger turbo for high RPM.Twin-turbo in-line six-cylinderThe all-new Coupé bodyshell clothes the twin-turbo 3.0-litre engine in the new BMW 335i SE that develops 306hp and 400Nm of torque between 1,300 - 5,000rpm. With such performance statistics, the 335i forms the pinnacle of the new 3 Series range.
The 335i SE Coupé accelerates from zero to 62mph in 5.5 seconds, and, if left unchecked, would travel on to an electronically-limited top speed of 155mph. This level of performance is made possible by two turbochargers, each supplying compressed air to three cylinders each. The use of two smaller units ensures that the turbochargers react more quickly to changes in the throttle position all the way to the 7,000rpm red line while also eliminating the previous scourge of turbocharged engines – ‘turbo lag’.
Also, equalizing boost from two turbos that independently supply boost to different pistons, how is this managed?
Any explanations, turbo gurus???